Unsteady and three-dimensional flow phenomena in a transonic centrifugal compressor impeller at rotating stall

Kenichiro Iwakiri, Masato Furukawa, Seiichi Ibaraki, Isao Tomita

研究成果: 書籍/レポート タイプへの寄稿会議への寄与

30 被引用数 (Scopus)

抄録

This paper presents a combined experimental and numerical analysis of rotating stall in a transonic centrifugal compressor impeller for automotive turbochargers. Stall characteristics of the compressor were examined by two high-response pressure transducers mounted on the casing wall near the impeller inlet. The pressure traces were analyzed by wavelet transforms to estimate the disturbance waves quantitatively. Three-dimensional unsteady internal flow fields were simulated numerically by Detached Eddy Simulation (DES) coupled LES-RANS approach. The analysis results show good agreements on both compressor performance characteristics and the unsteady flow features at the rotating stall. At stall inception, spiral-type breakdown of the full-blade tip leakage vortex was found out at some passages and the brokendown regions propagated against the impeller rotation. This phenomenon changed with throttling, and tornado-type separation vortex caused by the full-blade leading edge separation dominated the flow field at developed stall condition. It is similar to the flow model of short-length scale rotating stall established in an axial compressor rotor.

本文言語英語
ホスト出版物のタイトルProceedings of the ASME Turbo Expo 2009
ホスト出版物のサブタイトルPower for Land, Sea and Air
ページ1611-1622
ページ数12
PART B
DOI
出版ステータス出版済み - 12月 1 2009
イベント2009 ASME Turbo Expo - Orlando, FL, 米国
継続期間: 6月 8 20096月 12 2009

出版物シリーズ

名前Proceedings of the ASME Turbo Expo
番号PART B
7

その他

その他2009 ASME Turbo Expo
国/地域米国
CityOrlando, FL
Period6/8/096/12/09

!!!All Science Journal Classification (ASJC) codes

  • 工学(全般)

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